netdev - [PATCH v4 12/42] selinux: exempt creation of init SELinux namespace from limits

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Message-ID: <20250610172226.1470741-13-stephen.smalley.work@gmail.com>
Date: Tue, 10 Jun 2025 13:21:43 -0400
From: Stephen Smalley <stephen.smalley.work@...il.com>
To: selinux@...r.kernel.org
Cc: paul@...l-moore.com,
	omosnace@...hat.com,
	netdev@...r.kernel.org,
	Stephen Smalley <stephen.smalley.work@...il.com>
Subject: [PATCH v4 12/42] selinux: exempt creation of init SELinux namespace from limits

Exempt the creation of the init SELinux namespace from the
maxns limit. It was already exempted from the maxnsdepth
limit by virtue of only applying that check when there
is a parent namespace. Otherwise, if one were to set
CONFIG_SECURITY_SELINUX_MAXNS to 0, the creation of the
init SELinux namespace would fail.

Signed-off-by: Stephen Smalley <stephen.smalley.work@...il.com>
---
 security/selinux/hooks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index eaac0ed9fcd2..dcdc8c23590e 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -7787,7 +7787,7 @@ int selinux_state_create(struct selinux_state *parent,
 	struct selinux_state *newstate;
 	int rc;
 
-	if (atomic_read(&selinux_nsnum) >= selinux_maxns)
+	if (parent && atomic_read(&selinux_nsnum) >= selinux_maxns)
 		return -ENOSPC;
 
 	if (parent && parent->depth >= selinux_maxnsdepth)
-- 
2.49.0